An unidentified leader of the group was arrested today in a follow-up investigation.

A follow-up investigation offered more choices: neither, both, and don't know.

They all died during panic, so there was no follow-up investigation.

Now remember, the follow-up investigation is going to cost you money.

"And every hour spent here translates to a month's worth of follow-up investigation."

Since May, there have been follow-up investigations with fines attached.

Nor have we seen the follow-up investigation needed to determine whether the drugs are effective in the long term.

The relationship came to light as a result of an anonymous letter received by the company about two months ago, and a follow-up investigation.

She let her extensive experience in follow-up criminal investigations speak for itself.

He said that a follow-up investigation could exonerate all of the employees.